// Copyright 2011 Cooliris, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#import <Foundation/Foundation.h>

// Case-insensitive and diacritic insensitive
@interface TextIndex : NSObject <NSCoding> {
@private
  NSUInteger _maxCount;
  NSUInteger _wordCount;
  void* _wordList;
}
@property(nonatomic, readonly, getter=isEmpty) BOOL empty;
+ (void) setMinimumWordLength:(NSUInteger)length;  // Default is 0
+ (void) setStopWords:(NSString*)stopWords;  // Default is nil
- (void) updateWithString:(NSString*)string;
- (void) updateWithString:(NSString*)string minimumWordLength:(NSUInteger)minimumWordLength stopWords:(TextIndex*)stopWords;
- (BOOL) intersectsTextIndex:(TextIndex*)index;  // Returns YES if receiver contains any word from other index
- (BOOL) containsTextIndex:(TextIndex*)index;  // Returns YES if receiver contains all words from other index
@end

// Less overhead than NSCoding
@interface TextIndex (Serialization)
- (id) initWithDataRepresentation:(NSData*)data;
- (NSData*) dataRepresentation;
@end
